You are developing an ASP.NET Web page. You add the following markup to the page. You add the following code segment to the code-behind. You need to save the uploaded file and display a message to the user that indicates that the upload either succeeded or failed. Which two actions should you perform？（）

• A、Replace line 3 with the following code segment. if （FileUpload1.HasFile）
• B、Replace line 3 with the following code segment. if （FileUpload1.FileContent.Length > 0）
• C、Insert the following code segment at line 6.  FileUpload1.SaveAs（saveName）；
• D、Insert the following code segment at line 6. FileUpload1.FileContent.CopyTo（new FileStream（saveName， FileMode.Open）；